Here’s a brief but fascinating account of the life of Blessed Leonid Fedorov, hieromartyr and advocate for Christian unity (from Saint Joseph de Clairval Abbey, Flavigny). Another account can be found here (from the Australian Catholic periodical AD 2000). An akathist hymn and a supplicatory canon have been written, so that the faithful may invoke his intercession. And then there’s the beautiful prayer for Christian unity composed by Blessed Leonid himself:
O Merciful Lord Jesus, Our Savior, hear the prayers and petitions of Your unworthy sinful servants who humbly call upon You and make us all to be one in Your one, holy, catholic, and apostolic Church. Flood our souls with Your unquenchable light. Put an end to religious disagreements, and grant that we Your disciples and Your beloved children may all worship You with a single heart and voice. Fulfill quickly, O grace-giving Lord, your promise that there shall be one flock and one Divine Shepherd of Your Church; and may we be made worthy to glorify Your Holy Name now and ever and unto the ages of ages. Amen.